Fixed text domain.
Fixed text domain.
Comment is now translatable.
Added an overview of the subscriptions related to an domain name.
Use the WordPress Settings API for the settings.
Removed unused vars and use the plugin_include function.
Updated some texts and Dutch translations.
Addition of update date in send notifcation and the column in the save method
Missing datetime format
whitespace
Addition of a check for auto_renew false.
Addition of sent_notifications set/get and call in the send_notification method
Added some labels and updated Dutch translations.
Fixed use of 'defined', this is for constants, not for functions, afaik...
Fixing fatal error an saving subscription post.
Inclusion of a sent_notifications param
Clone the current date instead of new date time (could be second difference), modify the date, cleaner and easier to read.
Addition of since_last_reminder( DateInterval ) method.  Would also be beneficial to move this kind of check to the factory and make a setting.
Removed the set_license_key_md5 setter, and added name to renew URL.
Update to since_last_reminder method to make more optimal